I ended up buying one of these for wspr/jt65. Had a lot of problem setting up on wspr but worked first time on jt65. Could not get this interface to work with almost any version of wspr until i unistalled wspr and downloaded WSPR-X v0.8 r3058 after setting the parameters the software works. Dont ask me why I have no idea we'll just blame windows. Tried getting the same interface working on a MacBook Pro with absolutely no luck. WSPR works ok with audio to/from radio to Mac but I have to use VOX. Have installed the Prolific Driver on the Mac used the terminal program to interogate the interface which says it is there but cant get the WSPR program to talk to interface so I gave up.